4-star.

Similiarly to the character and ship sheets, this is a very good interactive PDF set for keeping track of your shinies all throughout the 'verse, though this time as the GM. Only major complaint is the lack of space on the sheets for light and medium major GMCs, as well as the small space for narrative descriptions on the larger sheets and no way in-document for you to highlight your preferred skills. But other than that, it has everything you'll need and more.

4.5-Star

A free, interactive PDF for both your character and a ship. Functional, easy to read, and looks very good. Minor complaints include the small amount of space available for the more narrative bits like background and such. Also there is no way to highlight a skill name to let you know it's one of your highlighted skills. Issue with the ship sheet is similar to problem 1 with character sheets. Other than those small problems, it's the best thing you can find for the Firefly RPG.